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《垃圾焚烧厂最佳可用技术参考文件》2018年版 4.5章 第一部分(待续) 学习笔记(一)

2020-02-12 11:30来源:无锡华星东方电力环保关键词:烟气净化工艺除尘技术华星东方收藏点赞

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Table 4.13:Energy requirements associated with the use of various pre-dedusters

Table 4.13: 不同预除尘使用所需要的能源需求

The most significant cross-media effects associated with this technique are:

当这些技术在不同介质方面最为显著的影响是:

•energy consumption due to pressure loss, which is higher with bag filters than for other systems;

布袋压损所需要的能源消耗高于其他系统;

•electricity consumption for ESP operation;

电除尘器的运行电耗

•flue-gas PCDD/F concentrations may increase during their residence time in the ESP, particularly when operated at temperatures between 200 °C to 450 °C.

烟气中的二噁英和呋喃的浓度可能会因为在静电除尘器停留的时间而升高,尤其是在200-450度之间运行时。(这是为什么歌本山在湿法洗涤中进行脱除的原因。)

Technical considerations relevant to applicability

4.5.2.1.6 技术适用性的考虑

Pre-dedusting requires space for the additional process unit, which may be a limiting factor for existing plants.

老厂改造可能会因为预除尘需要额外的布置空间而无法实现。

Economics

4.5.2.1.7 经济因素

The key aspects of this technique are:

这项技术的关键因素如下:

•increased capital and investment costs – for additional process units;

增加资本和投资成本—用于额外的工艺装置;

•increased energy costs, particularly for bag filtration;

增加能源消耗,特别是将布袋除尘作为预除尘时;

•possible cost reductions for disposal where outlets are available for segregated fly ash;

当飞灰可以单独处理时,设置预除尘可以减少处置成本。(如:吉安考虑飞灰鉴别,如最终确定不是危废,可以减少危废的处置成本)

•possible increased cost of handling additional residue streams (either for recovery or disposal).

由于预除尘需要额外的飞灰输送和处理装置(回收或处置),可能会增加投资成本。

Investment costs for a two-line MSWI with a total capacity of 200 000 t/yr are estimated as

[12, Achternbosch, 2002]:

2条线年处理20万吨的市政垃圾焚烧厂的投资估算如下:(2x300t/d)

•ESP (3-field):EUR 2.2 million;

3电场的静电预除尘:220万欧元;

•ESP (2-field): EUR 1.6 million;

2电场的静电预除尘:160万欧元;

•bag filter:EUR 2.2 million (not clear if this includes an upstream flue-gas cooler).

布袋除尘:220万欧元(不确定是否包括上游的烟气冷却反应器)

The unit operational costs of a bag filter for pre-dedusting may be higher due to the higher energy use associated with the pressure and the reagent injection. However, the bag filter's greater removal capacity for dust and for other pollutants (particularly when used with reagent injection) can result in reduced costs for subsequent components of the FGC system.

布袋除尘作为预除尘的能耗应该是最高的,主要是由于压降和需要喷入药剂等因素。但是,布袋除尘的除尘和脱酸具有更好的去除率(特别是和干粉喷射一起使用时),这可以降低烟气净化系统下游设备的投入成本。

Driving force for implementation

4.5.2.1.8 实施动力(该技术的优势)

• The FGC residues and fly ash can be separated and treated/recycled separately.

烟气净化的副产物和飞灰可以分开处理和回收。

• Smaller capacity downstream FGC equipment is required (dust loads are reduced).

下游设备处理容量减少(如:选型可以适当减小,因为粉尘浓度已经降低了)

• Improvements in the operation of downstream FGC systems.

改善了下游设备的运行工况。

• Preference for the removal of PCDD/F before wet scrubbing to reduce the memory effect.

在湿法洗涤塔前能去除二噁英/呋喃,以减少记忆效应。

Example plants

4.5.2.1.9 工厂案例

Widely applied in many incineration plants.

在许多焚烧厂广泛应用

Reference literature

4.5.2.1.10 参考文献

[ 2, InfoMil 2002 ], [ 55, EIPPCB 2002 ], [ 64, TWG 2003 ]

4.5.2.2 Downstream dedusting

4.5.2.2 下游除尘(主除尘、抛光除尘)


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